At about 6 a.m. Thursday, the temperature in Louisville was 9 degrees—and the wind chill was -10, the National Weather Service said. There was a chance of flurries before 9 a.m., also.

Jefferson County Public Schools is on a two-hour delay Thursday. A handful of other school districts are closed. There’s a list below.

Earlier: Temperatures will drop to the single digits early Thursday morning and not get out of the teens until Friday, the National Weather Service said.

With road conditions not great after Tuesday’s snow, Jefferson County Public schools again plans to delay the start of classes by two hours on Thursday. (No transportation will be provided for early childhood programs, too.)

JCPS adds:

JCPS will continue to monitor the weather overnight and consult with authorities in the early hours in the event of worsening conditions.— JCPS (@JCPSKY) January 22, 2014

A wind chill advisory has been issued for Louisville and the surrounding area from 4 a.m. to 1 p.m. Thursday, the National Weather Service said. Winds may gust as strong as 25 miles per hour during those times, leading to possible wind chills in the -5 to -15 range.